feather, good links.
I'm very confused about the combination of gaming and fiction writing. Is this fanfic or fantasy to be published and put on the shelves?
question, not all supernaturals are quick healing. It really depends on the book and the author's interpretation.
Also, trolls are not always large, at least not according to legend. Some can be quite small, and it's been debated that they retain a static size.
At any rate, this again runs into the same issue that a thread did last week. If you choose to write about a creature that is established in floklore and legend, you are relatively obligated to research it yourself, which shouldn't be asking people their opinions unless they are experts. Experts do not include Dungeon Masters and guild members on WOW. Once you've researched, you can either ditch all the info, use all the info, or pick and choose. You can mingle it with whatever your mind can imagine, and as long as YOUR BOOK has integrity, it's fine. These are fantasy creatures, and thus there are not rules about them. It is bendable.
-vampires do not need to drink blood.
-trolls do not need to be big and ugly.
-werewolves don't need to turn fuzzy.
And so on. If you can imagine it and reason it out, it can work. I can probably find and cite examples of all of the above. In fact, I can cite and example of the second one that pertains to this particular discussion whose author netted a fabulously lucrative book contract just a few months ago.
Amanda Hocking ring a bell?